why does black surface carries more dust(gets more dusty) than a white surface in equal time?

Question

i performed an experiment about this:
i placed one black and one white sheet of equal volume and same material in a room for 15 days.the sheets were paced close to each other side by side and the room was free of all variations.after 15 days,i found much more dust on black sheet(approx. 10 times more)than on white and i also sweeped some dust from both and checked it to eliminate any visual differences when viewing on a black and white surface.so,what is the reason 4 this?

Answer 1

Black surfaces absorb more visible light than white surfaces.

The light energy is converted to heat energy... so black surfaces are hotter than white surfaces.

Hotter surfaces have particles which move faster and collide more often than colder surfaces... so the atoms in black surfaces are involved in more (energetic) collisions than those in white surfaces.

The more (energetic and) often collisions occur, the greater the likelihood that electrons are displaced... so black surfaces tend to lose more electrons than white surfaces.

A loss of electrons means the material is positively charged... so black materials tend to be more positively charged than white materials.

Positively charged materials will attract neutral and negatively charged materials... so... all other things being equal, black materials tend to attract more dust (a neutral material) than white materials.

Have a nice day.

Answer 2

Most likely from the differences which result from the reflectance of the two sheets. The white would reflect the light and heat more than the black sheet and therefore the dust would be "repelled" from the white and "apparently" attracted to the black sheet. Note I said "apparently" as it is a relative difference between the two sheets.

Answer 3

It is because of "draft", that occurs when the heat reflects from those surfaces. The white surface is colder (i.e. absorbs less heat), and there is a kind of "draft" induced, because of the temperature difference between the surface and the environment. The black one gets heated easily, leveling it's temperature to the environmental temperature, and the draft doesn't appear.

Air circulation (the "draft") causes dust particle to move away from the white surface, whereas the black surface has no air circulation above, so there is no dust removing from it.

Clear enough?

Answer 4

i performed the same experiment, and they got equal dusting, so there had to have been a variation in your experiment. Even walking by the two sheets of paper would have made a difference. Also, the texture, moisture, and lightness of the paper really do make a difference.

Answer 5

The white sheet probably was cooler than the black one, since it reflects light and creates little convection eddies in the air above it.

The black sheet absorbs light and heat, so the dust could more easily settle there.

Were these sheets of paper, or bedsheets--not that it makes a difference, but you might have noticed a difference in warmth when you handled them?

Answer 6

Two posible things, but you covered one, The visiuale differenace, simply looks like there is more.

But the other could be that there is something in the ink that elctrostaticly attracts more dust to it, I think it might have something to do with the dye/ink in the paper. Try drawing on a white peice of paper with a black marker on one side of it, and leave the other white, and see what happens. also try different kinds of markers.

sorry about hte spelling mistakes, I'm dislexic, so it al looks right to me. Sorry.

Answer 7

It may be that the dye used to colour the sheet produced more static electricity which attracted the dust. I cannot see colour (blackness) as the only reason.

Answer 8

Perhaps color may influence the magnetic attraction of tiny particles. The same way that light surfaces reflect sunshine and dark surfaces absorb it. Feel hot in black shirts than in white ones.
TM

Answer 9

Black items retain heat and energy where white tends to reflect it. I have a black car and the static electricity on the paint surface is incredible. I have to wash it every few days just so it doesn’t look like crap.

Answer 10

Black absorbs more energy- what your seeing is a sheet of paper that is colored in such a way as to absorb more light. As the light photons impact the paper, it acquires a somewhat negative charge- which in turn, attracts airborne particles.